AirHint found the following cheapest return flights from Sandakan (SDK) to Singapore (SIN) in September 2025 (see full year).

Return flights

26 Sep - 29 Sep	AirAsia
25 Sep - 29 Sep	AirAsia
02 Sep - 11 Sep	AirAsia
06 Sep - 11 Sep	AirAsia
08 Sep - 29 Sep	AirAsia
08 Sep - 11 Sep	AirAsia
07 Sep - 10 Sep	Malaysia Airlines
28 Sep - 29 Sep	AirAsia
02 Sep - 14 Sep	AirAsia
06 Sep - 14 Sep	AirAsia
29 Sep - 20 Oct	AirAsia
26 Sep - 17 Oct	AirAsia
28 Sep - 18 Oct	AirAsia
29 Sep - 18 Oct	AirAsia
28 Sep - 17 Oct	AirAsia
29 Sep - 17 Oct	AirAsia

Also check the deals for one-way flights from Sandakan to Singapore in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Sandakan to Singapore in September from $186

Return flights